摘要
对铁基非晶合金粉末进行循环深冷处理增强其塑性变形能力,采用冷喷涂技术在AZ31B镁合金、6061铝合金以及Q235碳钢等具有不同性能的基体材料表面制备非晶涂层,研究深冷处理铁基非晶粉末在不同基体表面的沉积行为、涂层与基体间的界面结合状态以及涂层的摩擦磨损性能。结果表明,基体的硬度、导热系数和弹性模量会影响颗粒的应变条件、散热速率和回弹能量,进而影响涂层的变形状态、致密程度和沉积效率;深冷处理提高了非晶涂层的沉积效率,涂层的沉积厚度均大于原始非晶涂层。在摩擦磨损过程中,随着基体硬度的上升,基体及涂层的摩擦系数增大,磨损率降低。与基体相比,铁基非晶合金颗粒有效抑制了磨球的切削作用,原始非晶涂层的摩擦系数减小,磨损率降低;与原始非晶涂层相比,深冷处理非晶涂层更加致密,其摩擦系数曲线更加平稳,磨损率进一步降低。镁合金基体和非晶涂层的磨损机制都为磨粒磨损和氧化磨损;铝合金基体的磨损机制为粘着磨损和疲劳磨损以及氧化磨损,非晶涂层的磨损机制都为磨粒磨损和氧化磨损;碳钢基体和非晶涂层的磨损机制都为疲劳磨损和氧化磨损。
The iron-based amorphous alloy powder was subjected to cyclic cryogenic treatment to enhance the ability of plastic deformation,and coatings were deposited on substrate materials with different hardness,including AZ31B magnesium alloy,6061 alu minum alloy and Q235 carbon steel.The effect of cryogenic treatment on the cold spray deposition behavior of iron-based amorphous powder on different substrate materials was studied.The interfacial bonding state between coatings and substrate materials,the friction and wear properties of cold sprayed coatings were comprehensively evaluated.Results show that the hardness,thermal conductivity and elastic modulus of the substrate will affect the strain condition,heat dissipation rate and rebound energy of the particles,and then affect the deformation state,compactness and deposition efficiency of the coating.The cryogenic treatment improved the deposition efficiency of amorphous particles,resulting in a great increase of coating thickness.With the increase of hardness of substrate materials,the friction coefficient of substrates and coatings increased,and the wear loss reduced.Compared with the substrate,amorphous alloy particles effectively inhibited the cutting action of the grinding ball,leading to the decrease of the friction coefficient and mass loss of original amorphous coating.In comparison,amorphous coatings made of cyro-processed powders had higher density,the friction coefficient curve was more stable and the mass loss was further reduced.The wear mechanism of magnesium alloy matrix and the amorphous coating is abrasive and oxidative wear.The wear mechanism of alu minum alloy matrix is adhesion,fatigue and oxidative wear,while abrasive and oxidative wear are observed in the amorphous coating.The wear mechanism of carbon steel matrix and the amorphous coating is fatigue and oxidative wear.
作者
王强
毛轩
牛文娟
韩鹏
WANG Qiang;MAO Xuan;NIU Wenjuan;HAN Peng(School of Metallurgical Engineering Xi'an University of Architecture and Technology,Xi'an 710055,China;Shaanxi Research Center of Metallurgical Engineering,Xi'an 710055,China)
出处
《功能材料》
CAS
CSCD
北大核心
2022年第9期9159-9165,共7页
Journal of Functional Materials
基金
国家自然科学基金项目(51801143)
陕西省自然科学基金项目(2017JZ012)
陕西省教育厅专项项目(18JK0445)。
关键词
冷喷涂
非晶涂层
深冷处理
沉积行为
摩擦磨损性能
cold spray
amorphous coating
cryogenic treatment
deposition behavior
friction and wear properties
